APA (7th ed.) Citation

Helick, R. M. (1973). Elements of preschool playyards. Regent Graphic Services.

Chicago Style (17th ed.) Citation

Helick, R. Martin. Elements of Preschool Playyards. Pittsburgh: Regent Graphic Services, 1973.

MLA (9th ed.) Citation

Helick, R. Martin. Elements of Preschool Playyards. Regent Graphic Services, 1973.

Warning: These citations may not always be 100% accurate.