APA (7th ed.) Citation

Hartnack, W. (1930). Madeira: Landeskunde einer Insel. de Gruyter.

Chicago Style (17th ed.) Citation

Hartnack, Wilhelm. Madeira: Landeskunde Einer Insel. Berlin [u.a.]: de Gruyter, 1930.

MLA (9th ed.) Citation

Hartnack, Wilhelm. Madeira: Landeskunde Einer Insel. de Gruyter, 1930.

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