Cita APA (7th ed.)

kelly, R. (1971). The use of English for Technical students. The English language book society.

Cita Chicago (17th ed.)

kelly, R. The Use of English for Technical Students. NULL: The English language book society, 1971.

Cita MLA (9th ed.)

kelly, R. The Use of English for Technical Students. The English language book society, 1971.