Gaya APA
stein, R, G. (1956).
Fundamentals Of College Algebra With Trigonometry (edisi 1).
New York, USA:
Nelson Hall.
Gaya MLA
stein, Robert, G.
"Fundamentals Of College Algebra With Trigonometry".
edisi 1
New York, USA:
Nelson Hall,
1956.
Agribisnis.