APA
Schumm S. A., Stroudsburg M. P. M., .Slope morphology. Dowden: Hutchinson & Ross.
Chicago
Schumm Stanley Alfred, Stroudsburg M Paul Mosley, .Slope morphology. Dowden: Hutchinson & Ross.
Harvard
Schumm S. A., Stroudsburg M. P. M., .Slope morphology. Dowden: Hutchinson & Ross.
MLA
Schumm Stanley Alfred, Stroudsburg M Paul Mosley, .Dowden: Hutchinson & Ross. .