Gaya APA
Weir, F, R, G, -, M, D. (1991).
Differential Equations: A Modeling Approach .
USA:
Addison-Wesley Publising Company.
Gaya MLA
Weir, Frank, R., Giordano, -, Maurice, D..
"Differential Equations: A Modeling Approach".
USA:
Addison-Wesley Publising Company,
1991.
Text.