APA
Leishman J., . (2005). Themes and variations in Shakespeare's sonnets. New York: Routledge.
Chicago
Leishman J.B, . 2005. Themes and variations in Shakespeare's sonnets. New York: Routledge.
Harvard
Leishman J., . (2005). Themes and variations in Shakespeare's sonnets. New York: Routledge.
MLA
Leishman J.B, . Themes and variations in Shakespeare's sonnets. New York: Routledge. 2005.