APA (7th ed.) Citation

Fichte, J. G., Heath, P. L., & Lachs, J. (1970). Science of knowledge (Wissenschaftslehre). Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Fichte, Johann Gottlieb, Peter Lauchlan Heath, and John Lachs. Science of Knowledge (Wissenschaftslehre). New York: Appleton-Century-Crofts, 1970.

MLA (9th ed.) Citation

Fichte, Johann Gottlieb, et al. Science of Knowledge (Wissenschaftslehre). Appleton-Century-Crofts, 1970.