Cita APA (7a ed.)
Tivnan, T. (2009). Reasons to be cheerful. Bookseller, 5365, 18-20.
Cita Chicago Style (17a ed.)
Tivnan, Tom. "Reasons to Be Cheerful." Bookseller 5365 (2009): 18-20.
Cita MLA (9a ed.)
Tivnan, Tom. "Reasons to Be Cheerful." Bookseller, 5365, 2009, pp. 18-20.
Precaución: Estas citas no son 100% exactas.