Cita APA (7th ed.)

Wellman, G. (1998). The Heinemann English wordbuilder. Heinemann.

Cita Chicago (17th ed.)

Wellman, Guy. The Heinemann English Wordbuilder. Oxford: Heinemann, 1998.

Cita MLA (8th ed.)

Wellman, Guy. The Heinemann English Wordbuilder. Heinemann, 1998.