APA (7th ed.) Citation

Engel, W. [Pietor, Ambro]. s.n.

Chicago Style (17th ed.) Citation

Engel, Wilhelm. [Pietor, Ambro]. [S.l: s.n.

MLA (9th ed.) Citation

Engel, Wilhelm. [Pietor, Ambro]. s.n.

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