APA (7th ed.) Citation

D'Eça, R., & Greenfield, E. V. (1979). Portuguese grammar. Barnes & Noble Books.

Chicago Style (17th ed.) Citation

D'Eça, Raul, and Eric V. Greenfield. Portuguese Grammar. New York: Barnes & Noble Books, 1979.

MLA (9th ed.) Citation

D'Eça, Raul, and Eric V. Greenfield. Portuguese Grammar. Barnes & Noble Books, 1979.