APA (7th ed.) Citation

Malcher, F., Hubbard, T. K., & Hubbard, H. V. (1935). The steadyflow traffic system. Harvard university press.

Chicago Style (17th ed.) Citation

Malcher, Fritz, Theodora Kimball Hubbard, and Henry Vincent Hubbard. The Steadyflow Traffic System. Cambridge: Harvard university press, 1935.

MLA (9th ed.) Citation

Malcher, Fritz, et al. The Steadyflow Traffic System. Harvard university press, 1935.