Παραπομπή APA

Ryder, G. H. (1969). strength of materials (Ed.3.). Mac millan.

Παραπομπή Chicago Style

Ryder, G H. Strength of Materials. Ed.3. Madras: Mac millan, 1969.

Παραπομπή MLA

Ryder, G H. Strength of Materials. Ed.3. Mac millan, 1969.