APA (7th ed.) Citation

Kapit͡sa, P. L., Капица, П. Л., Lockwood, D. J., & National Research Council of Canada. (1989). Letters to mother: The early Cambridge period. National Research Council Canada.

Chicago Style (17th ed.) Citation

Kapit͡sa, P. L., П. Л Капица, David J. Lockwood, and National Research Council of Canada. Letters to Mother: The Early Cambridge Period. Ottawa: National Research Council Canada, 1989.

MLA (8th ed.) Citation

Kapit͡sa, P. L., et al. Letters to Mother: The Early Cambridge Period. National Research Council Canada, 1989.