APA (7th ed.) Citation

Apfel, A. Der Mutterboden . [s.n.].

Chicago Style (17th ed.) Citation

Apfel, A. Der Mutterboden . [s.l.]: [s.n.].

MLA (8th ed.) Citation

Apfel, A. Der Mutterboden . [s.n.].

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