APA Style
Anonymous, . ().
Learning Ladder: The Complete Learning Sustem for Your Child, Years 1 and 2, ages 5-7 .
:
Dorling Kindersley.
MLA Style
Anonymous, .
"Learning Ladder: The Complete Learning Sustem for Your Child, Years 1 and 2, ages 5-7".
:
Dorling Kindersley,
.
CD-ROM.