George Trumbul Ladd: the great textbook writer.

MLA

Mills, E. S. “George Trumbul Ladd: The Great Textbook Writer.” Journal of the History of the Behavioral Sciences, vol. 10, July 1974, pp. 299–303. EBSCOhost, https://doi.org/10.1002/1520-6696(197407)10:3<299::aid-jhbs2300100305>3.0.co;2-x.

APA

Mills, E. S. (1974). George Trumbul Ladd: the great textbook writer. Journal of the History of the Behavioral Sciences, 10, 299–303. https://doi.org/10.1002/1520-6696(197407)10:3<299::aid-jhbs2300100305>3.0.co;2-x

Chicago

Mills, E S. 1974. “George Trumbul Ladd: The Great Textbook Writer.” Journal of the History of the Behavioral Sciences 10 (July): 299–303. doi:10.1002/1520-6696(197407)10:3<299::aid-jhbs2300100305>3.0.co;2-x.