Cita APA (7th ed.)

Beuschold, E. (1978). Problem Wasser. Urania Verlag.

Cita Chicago (17th ed.)

Beuschold, Erhard. Problem Wasser. Leipzig: Urania Verlag, 1978.

Cita MLA (8th ed.)

Beuschold, Erhard. Problem Wasser. Urania Verlag, 1978.