APA (7th ed.) Citation

Nelken, H. (1980). Alexander von Humboldt: His portraits and their artists; a documentary iconography. Reimer.

Chicago Style (17th ed.) Citation

Nelken, Halina. Alexander Von Humboldt: His Portraits and Their Artists; a Documentary Iconography. Berlin: Reimer, 1980.

MLA (8th ed.) Citation

Nelken, Halina. Alexander Von Humboldt: His Portraits and Their Artists; a Documentary Iconography. Reimer, 1980.

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