Education Center (Greensboro, N.C.). (1998). The mailbox teacher. Education Center.
Cita Chicago (17th ed.)Education Center (Greensboro, N.C.). The Mailbox Teacher. Greensboro, NC: Education Center, 1998.
Cita MLA (9th ed.)Education Center (Greensboro, N.C.). The Mailbox Teacher. Education Center, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.