Cita APA (7a ed.)

Ettinger, J. v. (1960). Towards a habitable world: Task problems and methods acceleration. Elsevie.

Cita Chicago Style (17a ed.)

Ettinger, Jan van. Towards a Habitable World: Task Problems and Methods Acceleration. Amsterdam: Elsevie, 1960.

Cita MLA (9a ed.)

Ettinger, Jan van. Towards a Habitable World: Task Problems and Methods Acceleration. Elsevie, 1960.