APA (7th ed.) Citation

Portilla Robertson, M. (1969). Tolerancias en engranes. MX.

Chicago Style (17th ed.) Citation

Portilla Robertson, Marcial. Tolerancias En Engranes. MX, 1969.

MLA (8th ed.) Citation

Portilla Robertson, Marcial. Tolerancias En Engranes. MX, 1969.

Warning: These citations may not always be 100% accurate.