Study a single sutra by selecting the pada (chapter) and then the sutra (verse).
Source: English translation from The Yoga Sutras of Patanjali (Sri Swami Satchidananda)
The eight limbs of Yoga are:
1) yama (abstinence)
2) niyama (observance)
3) asana (posture)
4) pranayama (breath control)
5) pratyahara (sense withdrawal)
6) dharana (concentration)
7) dhyana (meditation)
8) samadhi (contemplation, absorption or superconscious state)
Source: English translation from Light on the Yoga Sutras of Patanjali (B.K.S. Iyengar)
Moral injunctions (yama), fixed observances (niyama), posture (asana), regulation of breath (pranayama), internalization of the senses towards their source (pratyahara), concentration (dharana), meditation (dhyana) and absorption of consciousness in the self (samadhi), are the eight constituents of yoga.
Source: How to Know God: The Yoga Aphorisms of Patanjali (Swami Prabhavananda, Christopher Isherwood)
The eight limbs of yoga are: the various forms of abstention from evil-doing (yama), the various observances (niyamas), posture (asana), control of the prana (pranayama), withdrawal of the mind from sense objects (pratyahara), concentration (dharana), meditation (dhyana) and absorption in the Atman (samadhi).
Source: English translation from The Heart of Yoga (T.K.V. Desikachar)
There are eight components of Yoga. These are:
Source: English translation of the Yoga Sutras of Patanjali (Swami Jnaneshvara Bharati)
The eight rungs, limbs, or steps of Yoga are the codes of self-regulation or restraint (yamas), observances or practices of self-training (niyamas), postures (asana), expansion of breath and prana (pranayama), withdrawal of the senses (pratyahara), concentration (dharana), meditation (dhyana), and perfected concentration (samadhi).