Gaya APA
Truett, L, J, T, -, D, B. (1987).
economics (1).
Missouri - Amerika Serikat:
Times Mirror/ Mosby College Publishing.
Gaya MLA
Truett, Lila, J., Truett, -, Dale, B..
"economics".
1
Missouri - Amerika Serikat:
Times Mirror/ Mosby College Publishing,
1987.
Ekonomi.