APA (7th ed.) Citation

Popescu, J. (1979). Russian space exploration: The first 21 years. Gothard House Publications.

Chicago Style (17th ed.) Citation

Popescu, Julian. Russian Space Exploration: The First 21 Years. Henley-on-Thames, Eng.: Gothard House Publications, 1979.

MLA (9th ed.) Citation

Popescu, Julian. Russian Space Exploration: The First 21 Years. Gothard House Publications, 1979.

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