Reyes, S. F. A computer program for the analysis of Earth slopes. U. P. Engineering research journal.
Chicago Style aipamenaReyes, Salvador F. "A Computer Program for the Analysis of Earth Slopes." U. P. Engineering Research Journal .
MLA aipamenaReyes, Salvador F. "A Computer Program for the Analysis of Earth Slopes." U. P. Engineering Research Journal, .
Kontuz: berrikusi erreferentzia hauek erabili aurretik.