APA (7e ed.) Bronvermelding

Dyer, W. (1981). The sky is the limit. Pocket books.

Chicago (17e ed.) Bronvermelding

Dyer, Wayne. The Sky Is the Limit. New york: Pocket books, 1981.

MLA (9e ed.) Bronvermelding

Dyer, Wayne. The Sky Is the Limit. Pocket books, 1981.