APA (7th ed.) Citation

The modern language association of America & Parker, W. R. (1951). The MLA style sheet (Rev. ed.). [Modern Language Association of America].

Chicago Style (17th ed.) Citation

The modern language association of America and William Riley Parker. The MLA Style Sheet. Rev. ed. New York: [Modern Language Association of America], 1951.

MLA (9th ed.) Citation

The modern language association of America and William Riley Parker. The MLA Style Sheet. Rev. ed. [Modern Language Association of America], 1951.