APA (7th ed.) Citation

Wolfram, H. (2006). Conrad II, 990-1039: Emperor of three kingdoms. The Pennsylvania State Univ. Press.

Chicago Style (17th ed.) Citation

Wolfram, Herwig. Conrad II, 990-1039: Emperor of Three Kingdoms. University Park, Pa: The Pennsylvania State Univ. Press, 2006.

MLA (9th ed.) Citation

Wolfram, Herwig. Conrad II, 990-1039: Emperor of Three Kingdoms. The Pennsylvania State Univ. Press, 2006.

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