APA (7th ed.) Citation

Zahoor Ahmad, A., Muhammad Hanif, A., & Muhammad Qaiser Shahbaz, A. (2013). Two Phase Sampling.

Chicago Style (17th ed.) Citation

Zahoor Ahmad, Author, Author Muhammad Hanif, and Author Muhammad Qaiser Shahbaz. Two Phase Sampling. 2013.

MLA (9th ed.) Citation

Zahoor Ahmad, Author, et al. Two Phase Sampling. 2013.