Gaya APA

Zill, D, G., Wright, W, S. (2013). Differential Equations with Boundary-value Problems eighth edition (Eighth Edition). China: Cengage Learning.

Gaya MLA

Zill, Dennis, G.., Wright, Warren, S.. "Differential Equations with Boundary-value Problems eighth edition". Eighth Edition China: Cengage Learning, 2013. Text.