Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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