APA (7th ed.) Citation

Frey, H. (1971). Das Süßwasser-Aquarium. Urania Verlag.

Chicago Style (17th ed.) Citation

Frey, Hans. Das Süßwasser-Aquarium. Leipzig: Urania Verlag, 1971.

MLA (8th ed.) Citation

Frey, Hans. Das Süßwasser-Aquarium. Urania Verlag, 1971.

Warning: These citations may not always be 100% accurate.