APA-referens (7:e uppl.)

SUYANTO, K. K., & SRI RACHMAJANTI. Let's communicate in english: a speaking course for advanced: A speaking course for advanced. Bayumedia.

Chicago-referens (17:e uppl.)

SUYANTO, Kasihani K.E, och SRI RACHMAJANTI. Let's Communicate in English: A Speaking Course for Advanced: A Speaking Course for Advanced. Malang: Bayumedia.

MLA-referens (9:e uppl.)

SUYANTO, Kasihani K.E, och SRI RACHMAJANTI. Let's Communicate in English: A Speaking Course for Advanced: A Speaking Course for Advanced. Bayumedia.