APA citiranje

Seymour, D., & Greenes, C. E. (1975). Activities with Geoblocks. Creative Publications.

Chicago Style (17th ed.) Citation

Seymour, Dale, and Carole E. Greenes. Activities with Geoblocks. Palo Alto, Calif.: Creative Publications, 1975.

MLA citiranje

Seymour, Dale, and Carole E. Greenes. Activities with Geoblocks. Creative Publications, 1975.