Cita APA (7a ed.)

The Amateur Softball Association of America. (1989). The Amateur Softball Association of America, official 1989 guide and rule book. Amateur Softball Association of America.

Cita Chicago Style (17a ed.)

The Amateur Softball Association of America. The Amateur Softball Association of America, Official 1989 Guide and Rule Book. Oklahoma City: Amateur Softball Association of America, 1989.

Cita MLA (9a ed.)

The Amateur Softball Association of America. The Amateur Softball Association of America, Official 1989 Guide and Rule Book. Amateur Softball Association of America, 1989.