APA (7th ed.) Citation

Helb, W. (1972). Album Rubonorum, 1875-1972.

Chicago Style (17th ed.) Citation

Helb, Woldemar. Album Rubonorum, 1875-1972. 1972.

MLA (9th ed.) Citation

Helb, Woldemar. Album Rubonorum, 1875-1972. 1972.

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