MLA

Cook, Thomas Louis. An Integrated Phonology of Efik : Volume I. The Earlier Stages of the Phonological Derivation with Particular Attention to the Vowel and Tone Systems. Dordrecht: Okpoebot, 1985.

APA

Cook, T. Louis. (1985). An integrated phonology of Efik : volume I. The earlier stages of the phonological derivation with particular attention to the vowel and tone systems. Dordrecht: Okpoebot.

Chicago

Cook, Thomas Louis An Integrated Phonology of Efik: Volume I. The Earlier Stages of the Phonological Derivation with Particular Attention to the Vowel and Tone Systems. Dordrecht: Okpoebot, 1985.