Cita APA (7th ed.)

Ernsting, W., Mahr, K., & Ackerman, W. (1974). Invasion from space. Futura Publications Ltd.

Cita Chicago (17th ed.)

Ernsting, Walter, Kurt Mahr, i Wendayne Ackerman. Invasion from Space. London (49 Poland St., W1A 2LG): Futura Publications Ltd, 1974.

Cita MLA (8th ed.)

Ernsting, Walter, et al. Invasion from Space. Futura Publications Ltd, 1974.