APA Style
Variety reduction program. (1990).
Cambridge:
Productivity Press.
Chicago Style
Variety reduction program.
.
Cambridge:
Productivity Press,
1990.
Printed Material.
MLA Style
Variety reduction program.
.
Cambridge:
Productivity Press,
1990.
Printed Material.
Turabian Style
Variety reduction program.
Cambridge:
Productivity Press,
1990.
Printed Material.