APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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