APA (7th ed.) Citation

Eckardt, O. W. (1969). Strength of materials: Problem book and study guide. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Eckardt, Ottmar W. Strength of Materials: Problem Book and Study Guide. New York: Holt, Rinehart and Winston, 1969.

MLA (9th ed.) Citation

Eckardt, Ottmar W. Strength of Materials: Problem Book and Study Guide. Holt, Rinehart and Winston, 1969.