APA (7th ed.) Citation

Romanus, P. F., & Ritzsch, T. De Osculis.

Chicago Style (17th ed.) Citation

Romanus, Paul Franz, and Timotheus Ritzsch. De Osculis.

MLA (9th ed.) Citation

Romanus, Paul Franz, and Timotheus Ritzsch. De Osculis.

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