APA-referens (7:e uppl.)

Cleve, F. M. (1973). The giants of pre-sophistic greek philosophy (3a. ed.). Martinus Nijhoff.

Chicago-referens (17:e uppl.)

Cleve, Felix M. The Giants of Pre-sophistic Greek Philosophy. 3a. ed. La Haya: Martinus Nijhoff, 1973.

MLA-referens (9:e uppl.)

Cleve, Felix M. The Giants of Pre-sophistic Greek Philosophy. 3a. ed. Martinus Nijhoff, 1973.