Chicago: "Op. Cit.," Op. Cit. in Primitive Behavior: An Introduction to the Social Sciences, ed. Thomas, William I. (New York: McGraw-Hill Book Company, Inc., 1937), Original Sources, accessed May 27, 2022, http://www.originalsources.com/Document.aspx?DocID=6FSV5MWDKYKVG9E.
MLA: . "Op. Cit." Op. Cit., in Primitive Behavior: An Introduction to the Social Sciences, edited by Thomas, William I., New York, McGraw-Hill Book Company, Inc., 1937, Original Sources. 27 May. 2022. http://www.originalsources.com/Document.aspx?DocID=6FSV5MWDKYKVG9E.
Harvard: , 'Op. Cit.' in Op. Cit.. cited in 1937, Primitive Behavior: An Introduction to the Social Sciences, ed. , McGraw-Hill Book Company, Inc., New York. Original Sources, retrieved 27 May 2022, from http://www.originalsources.com/Document.aspx?DocID=6FSV5MWDKYKVG9E.