Cita APA (7a ed.)

Samelson, W. (1974). English as a second language. Phase One: Let´s converse. Reston Publishing.

Cita Chicago Style (17a ed.)

Samelson, William. English as a Second Language. Phase One: Let´s Converse. Virginia, Estados Unidos: Reston Publishing, 1974.

Cita MLA (9a ed.)

Samelson, William. English as a Second Language. Phase One: Let´s Converse. Reston Publishing, 1974.