APA (7th ed.) Citation

Öpik, E. (1936). Researches on the physical theory of meteor phenomena.

Chicago Style (17th ed.) Citation

Öpik, Ernst. Researches on the Physical Theory of Meteor Phenomena. Tartu, 1936.

MLA (9th ed.) Citation

Öpik, Ernst. Researches on the Physical Theory of Meteor Phenomena. 1936.

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