APA (7th ed.) Citation

Popescu, I., & Altmann, G. (2009). Word frequency studies. Mouton de Gruyter.

Chicago Style (17th ed.) Citation

Popescu, Ioan-Ioviț, and Gabriel Altmann. Word Frequency Studies. Berlin ; New York: Mouton de Gruyter, 2009.

MLA (9th ed.) Citation

Popescu, Ioan-Ioviț, and Gabriel Altmann. Word Frequency Studies. Mouton de Gruyter, 2009.

Warning: These citations may not always be 100% accurate.