APA (7th ed.) Citation

Ambarcumjan, V. A. (1953). Das Weltall. Barth.

Chicago Style (17th ed.) Citation

Ambarcumjan, Viktor Amazaspovič. Das Weltall. Leipzig: Barth, 1953.

MLA (9th ed.) Citation

Ambarcumjan, Viktor Amazaspovič. Das Weltall. Barth, 1953.

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