APA (7th ed.) Citation

Frolich, F. (1973). Complex studies on variations of the secular behaviour in the Earth's mantle. Geest & Portig.

Chicago Style (17th ed.) Citation

Frolich, Friedrich. Complex Studies on Variations of the Secular Behaviour in the Earth's Mantle. Leipzig: Geest & Portig, 1973.

MLA (9th ed.) Citation

Frolich, Friedrich. Complex Studies on Variations of the Secular Behaviour in the Earth's Mantle. Geest & Portig, 1973.