APA (7th ed.) Citation

Willkomm, H. W. (1911). Uber Richard Johnsons Seven champions of Christendom (1596).

Chicago Style (17th ed.) Citation

Willkomm, Hans Werner. Uber Richard Johnsons Seven Champions of Christendom (1596). [Berlin], 1911.

MLA (8th ed.) Citation

Willkomm, Hans Werner. Uber Richard Johnsons Seven Champions of Christendom (1596). 1911.

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