Cita APA (7a ed.)

Eckersley, C. E. (1945). Essential English: Book one. Longmans, Green and Co..

Cita Chicago Style (17a ed.)

Eckersley, C. E. Essential English: Book One. Londres: Longmans, Green and Co., 1945.

Cita MLA (8a ed.)

Eckersley, C. E. Essential English: Book One. Longmans, Green and Co., 1945.