MLA

Nooteboom, Sibout Govert. Production and Perception of Vowel Duration : a Study of Durational Properties of Vowels In Dutch. Utrecht: [s.n.], 1972.

APA

Nooteboom, S. Govert. (1972). Production and perception of vowel duration : a study of durational properties of vowels in Dutch. Utrecht: [s.n.].

Chicago

Nooteboom, Sibout Govert, Production and Perception of Vowel Duration: A Study of Durational Properties of Vowels In Dutch. Utrecht: [s.n.], 1972.