Cita APA (7a ed.)

Billy Collins prologuista & O'Brien, G. 1. e. (2004). Bartlett's poems for occasions (1st edition.). Little, Brown and Company.

Cita Chicago Style (17a ed.)

Billy Collins prologuista y Geoffrey 1948- editor O'Brien. Bartlett's Poems for Occasions. 1st edition. New York [etc.]: Little, Brown and Company, 2004.

Cita MLA (9a ed.)

Billy Collins prologuista y Geoffrey 1948- editor O'Brien. Bartlett's Poems for Occasions. 1st edition. Little, Brown and Company, 2004.