MLA

Pike, Kenneth L. Language In Relation to a Unified Theory of the Structure of Human Behaviour. 2nd rev. ed. The Hague: Mouton, 1971.

APA

Pike, K. L. (1971). Language in relation to a unified theory of the structure of human behaviour. 2nd rev. ed. The Hague: Mouton.

Chicago

Pike, Kenneth L. Language In Relation to a Unified Theory of the Structure of Human Behaviour. 2nd rev. ed. The Hague: Mouton, 1971.