Cita APA (7th ed.)

Carvell, F., & Tadlock, M. (1971). It's not too late. Glencoe.

Cita Chicago (17th ed.)

Carvell, Fred, i Max Tadlock. It's Not Too Late. Beverly Hills: Glencoe, 1971.

Cita MLA (9th ed.)

Carvell, Fred, i Max Tadlock. It's Not Too Late. Glencoe, 1971.