Lua APA (7ú heag.)
Ahmad, Z., Shahbaz, M. Q., & Ḥanīf, M. (2013). Two phase sampling. Cambridge Scholars Publishing.
Lua i Stíl Chicago (17ú heag.)
Ahmad, Zahoor, Muhammad Qaiser Shahbaz, agus Muḥammad Ḥanīf. Two Phase Sampling. Newcastle upon Tyne: Cambridge Scholars Publishing, 2013.
Lua MLA (9ú heag.)
Ahmad, Zahoor, et al. Two Phase Sampling. Cambridge Scholars Publishing, 2013.
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