APA (7th ed.) Citation

Witting, R. (1907). Das Ostmarken-Problem. Puttkammer & Mühlbrecht.

Chicago Style (17th ed.) Citation

Witting, Richard. Das Ostmarken-Problem. Berlin: Puttkammer & Mühlbrecht, 1907.

MLA (9th ed.) Citation

Witting, Richard. Das Ostmarken-Problem. Puttkammer & Mühlbrecht, 1907.

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