Hillen, T., Leonard, I. E., & Van Roessel, H. (2012). Partial differential equations: Theory and completely solved problems. Wiley.
Chicago-viite (17. p.)Hillen, Thomas, I. Ed Leonard, ja Henry Van Roessel. Partial Differential Equations: Theory and Completely Solved Problems. Hoboken, New Jersey: Wiley, 2012.
MLA-viite (9. p.)Hillen, Thomas, et al. Partial Differential Equations: Theory and Completely Solved Problems. Wiley, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.