APA-viite (7. p.)
Rybold, G., & Harvey-Smith, N. (2013). Speaking, listening and understanding: English language debate for non-native speakers (Revised edition.). International Debate Education Association.
Chicago-viite (17. p.)
Rybold, Gary, ja Neill Harvey-Smith. Speaking, Listening and Understanding: English Language Debate for Non-native Speakers. Revised edition. New York: International Debate Education Association, 2013.
MLA-viite (9. p.)
Rybold, Gary, ja Neill Harvey-Smith. Speaking, Listening and Understanding: English Language Debate for Non-native Speakers. Revised edition. International Debate Education Association, 2013.
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