APA (7th ed.) Citation

Diercks, G. (1913). Das moderne Portugal (2 ed.). H.Paetel.

Chicago Style (17th ed.) Citation

Diercks, Gustav. Das Moderne Portugal. 2 ed. Berlin: H.Paetel, 1913.

MLA (9th ed.) Citation

Diercks, Gustav. Das Moderne Portugal. 2 ed. H.Paetel, 1913.