APA

Hildreth C. and etc, Hildreth C, . (1940). At play. [Philadelphia]: The john C. Winston company.

Chicago

Hildreth C. and etc, Hildreth C, . 1940. At play. [Philadelphia]: The john C. Winston company.

Harvard

Hildreth C. and etc, Hildreth C, . (1940). At play. [Philadelphia]: The john C. Winston company.

MLA

Hildreth C. and etc, Hildreth C, . At play. [Philadelphia]: The john C. Winston company. 1940.