Coster, C., & Habets, P. (2006). Two-point boundary value problems lower and upper solutions. Elsevier.
استشهاد بنمط شيكاغوCoster, C.De, و P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Amsterdam: Elsevier, 2006.
MLA استشهادCoster, C.De, و P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Elsevier, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.