Cita APA (7th ed.)

O'Neill, R. (1978). American kernel lessons: Intermediate : student's tests. Longman.

Cita Chicago (17th ed.)

O'Neill, Robert. American Kernel Lessons: Intermediate : Student's Tests. New York: Longman, 1978.

Cita MLA (9th ed.)

O'Neill, Robert. American Kernel Lessons: Intermediate : Student's Tests. Longman, 1978.