APA (7th ed.) Citation

Osten-Sacken, C. R. (1903). Record of my life work in entomology. [publisher not identified].

Chicago Style (17th ed.) Citation

Osten-Sacken, C. R. Record of My Life Work in Entomology. Cambridge, Mass.: [publisher not identified], 1903.

MLA (9th ed.) Citation

Osten-Sacken, C. R. Record of My Life Work in Entomology. [publisher not identified], 1903.