(1974). Oral English: Some techniques for teaching. Information Center Service.
Čikaški stil citiranja (17. izdanje)Oral English: Some Techniques for Teaching. Washington, Estados Unidos: Information Center Service, 1974.
MLA način citiranja (9. izdanje)Oral English: Some Techniques for Teaching. Information Center Service, 1974.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.
