APA (7th ed.) Citation

Tönnies, F., & Høffding, H. (1989). Briefwechsel. Duncker & Humblot.

Chicago Style (17th ed.) Citation

Tönnies, Ferdinand, and Harald Høffding. Briefwechsel. Berlin: Duncker & Humblot, 1989.

MLA (9th ed.) Citation

Tönnies, Ferdinand, and Harald Høffding. Briefwechsel. Duncker & Humblot, 1989.

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