Gaya APA

Bintang, W., Irwan, . (2014). Powerful public speaking (Cet. 1.). Yogyakarta: Penerbit Andi.

Gaya MLA

Bintang, Widayanto., Irwan, . "Powerful public speaking". Cet. 1. Yogyakarta: Penerbit Andi, 2014. Text.