Cita APA (7a ed.)

Sheeler, W. D. (1978). Welcome to ENGLISH: WORKBOOK 4. English Language Services.

Cita Chicago Style (17a ed.)

Sheeler, Willard D. Welcome to ENGLISH: WORKBOOK 4. English Language Services, 1978.

Cita MLA (8a ed.)

Sheeler, Willard D. Welcome to ENGLISH: WORKBOOK 4. English Language Services, 1978.