Seymour, D., & Greenes, C. E. (1975). Activities with Geoblocks. Creative Publications.
芝加哥风格引文Seymour, Dale, 与 Carole E. Greenes. Activities with Geoblocks. Palo Alto, Calif.: Creative Publications, 1975.
MLA引文Seymour, Dale, 与 Carole E. Greenes. Activities with Geoblocks. Creative Publications, 1975.
警告：这些引文格式不一定是100％准确.