APA (7 ম সংস্করণ) উদ্ধৃতি

Nunley, R. E. (1960). The distribution of population in Costa Rica. National Academy of Sciences, National Research Council.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Nunley, Robert Edward. The Distribution of Population in Costa Rica. Washington: National Academy of Sciences, National Research Council, 1960.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Nunley, Robert Edward. The Distribution of Population in Costa Rica. National Academy of Sciences, National Research Council, 1960.