APA (7th ed.) Citation

Frey, L., & Frey, M. (1984). Frederick I : the man and his times / Linda and Marsha Frey: The man and his times. East European Monographs.

Chicago Style (17th ed.) Citation

Frey, Linda, and Marsha Frey. Frederick I : The Man and His Times / Linda and Marsha Frey: The Man and His Times. Boulder: East European Monographs, 1984.

MLA (9th ed.) Citation

Frey, Linda, and Marsha Frey. Frederick I : The Man and His Times / Linda and Marsha Frey: The Man and His Times. East European Monographs, 1984.

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