Gaya APA

D., S, , L. (1980). Natural Process Analysis (NPA) : A Procedure for Phonological Analysis of Continuous Speech Samples . USA: John Wiley & Sons.

Gaya MLA

D., Shriberg, , Lawrence. "Natural Process Analysis (NPA) : A Procedure for Phonological Analysis of Continuous Speech Samples". USA: John Wiley & Sons, 1980. Text.