Gaya APA

H, I, M. et al (2011). Building blocks : english competency for year ix smp / mts (Cet. 1). Yogyakarta: Citra Aji Parama.

Gaya MLA

H, Ignatia, M.. et al. "Building blocks : english competency for year ix smp / mts". Cet. 1 Yogyakarta: Citra Aji Parama, 2011. Text.