Gaya APA
Truett, L, J., Truett, D, B.
(1987).
Economics TL
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St.Louis:
Times Mirror / Mosby College Pub.
Gaya MLA
Truett, Lila, Jane., Truett, Dale, B..
"Economics TL".
St.Louis:
Times Mirror / Mosby College Pub,
1987.
Text.