APA (7th ed.) Citation

Penninger, F. E. (1979). William Caxton. Twayne Publishers.

Chicago Style (17th ed.) Citation

Penninger, Frieda Elaine. William Caxton. Boston: Twayne Publishers, 1979.

MLA (9th ed.) Citation

Penninger, Frieda Elaine. William Caxton. Twayne Publishers, 1979.