Παραπομπή APA

Coster, C., & Habets, P. (2006). Two-point boundary value problems lower and upper solutions. Elsevier.

Παραπομπή Chicago Style

Coster, C.De, και P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Amsterdam: Elsevier, 2006.

Παραπομπή MLA

Coster, C.De, και P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Elsevier, 2006.