APA (7e ed.) Bronvermelding

Paul, E. C. (1974). The viability of Singapore: An aspect of modern political geography. University Microfilms International.

Chicago (17e ed.) Bronvermelding

Paul, Erik Charles. The Viability of Singapore: An Aspect of Modern Political Geography. Ann Arbor: University Microfilms International, 1974.

MLA (9e ed.) Bronvermelding

Paul, Erik Charles. The Viability of Singapore: An Aspect of Modern Political Geography. University Microfilms International, 1974.