MLA

Bontemps, Arna, 1902-1973. Popo and Fifina / Arna Bontemps and Langston Hughes ; illustrations by E. Simms Campbell ; introduction and afterword by Arnold Rampersand.. c1993.. https://collections.library.yale.edu/catalog/15504984.

APA, 6th edition

Bontemps, Arna, 1902-1973. (c1993.)[Popo and Fifina / Arna Bontemps and Langston Hughes ; illustrations by E. Simms Campbell ; introduction and afterword by Arnold Rampersand.]. https://collections.library.yale.edu/catalog/15504984.