APA (7th ed.) Citation

Belyayen, N. M., Sirk, W. U., & Kitching, R. (1966). Problems in strength of materials. Pergamon.

Chicago Style (17th ed.) Citation

Belyayen, N. M., W. U. Sirk, and R. Kitching. Problems in Strength of Materials. Oxford [etc.]: Pergamon, 1966.

MLA (9th ed.) Citation

Belyayen, N. M., et al. Problems in Strength of Materials. Pergamon, 1966.