Gaya APA

Smedes, L, B. (1990). Teknik mengambil keputusan. : Choices, making right decisions in a complex world. 1986 . Yogyakarta: Kanisius.

Gaya MLA

Smedes, Lewis, B.. "Teknik mengambil keputusan. : Choices, making right decisions in a complex world. 1986 ". Yogyakarta: Kanisius, 1990. Buku.