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.