Cita APA

Hockenbury, D. H., & Hockenbury, S. E. (2006). 4th ed. USA: Worth.

Chicago Style Citation

Hockenbury, Don H., i Sandra E. Hockenbury. 4th Ed. USA: Worth, 2006.

Cita MLA

Hockenbury, Don H., i Sandra E. Hockenbury. 4th Ed. USA: Worth, 2006.