MLA

van Ek, J. A. Four Complementary Structures of Predication In Contemporary British English : an Inventory. Groningen: Wolters, 1966.

APA

van Ek, J. A. (1966). Four complementary structures of predication in contemporary British English : an inventory. Groningen: Wolters.

Chicago

van Ek, J. A. Four Complementary Structures of Predication In Contemporary British English: An Inventory. Groningen: Wolters, 1966.