Gaya APA

Zill, D, G., Wright, W, S. (2013). Differential equations with boundary-value problems (international edition) / 8th edition . USA: Brooks/Cole Cengage Learning.

Gaya MLA

Zill, Dennis, G.., Wright, Warren, S.. "Differential equations with boundary-value problems (international edition) / 8th edition". USA: Brooks/Cole Cengage Learning, 2013. Text.