Cita APA (7th ed.)

(1969). Guppies, bubbles, and vibrating objects: A creative approach to the teaching of science to very young children / [by] John McGavack, Jr. [and] Donald P. LaSalle.

Cita Chicago (17th ed.)

Guppies, Bubbles, and Vibrating Objects: A Creative Approach to the Teaching of Science to Very Young Children / [by] John McGavack, Jr. [and] Donald P. LaSalle. 1969.

Cita MLA (9th ed.)

Guppies, Bubbles, and Vibrating Objects: A Creative Approach to the Teaching of Science to Very Young Children / [by] John McGavack, Jr. [and] Donald P. LaSalle. 1969.