Boyd, F., Quinn, D., & Keillor, G. (1990). Stories from lake Wobegon: Advanced listening and conversation skills. Longman.
Citazione stile Chigago Style (17a edizione)Boyd, Frances, David Quinn, e Garrison Keillor. Stories from Lake Wobegon: Advanced Listening and Conversation Skills. Nueva York: Longman, 1990.
Citatione MLA (9a ed.)Boyd, Frances, et al. Stories from Lake Wobegon: Advanced Listening and Conversation Skills. Longman, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.