Gaya APA

Kirn, E., Hartmann, P. (2007). Interactions 1 Reading, Silver Edition . Ny: Mc Graw-Hill.

Gaya MLA

Kirn, Elaine., Hartmann, Pamela. "Interactions 1 Reading, Silver Edition". Ny: Mc Graw-Hill, 2007. BUKU PENGAYAAN.