APA-Zitierstil (7. Ausg.)

Greenes, C. E., & Findell, C. R. (1999). Groundworks: Algebraic thinking, grade 2, [teacher book]. Creative Publications.

Chicago-Zitierstil (17. Ausg.)

Greenes, Carole E., und Carol R. Findell. Groundworks: Algebraic Thinking, Grade 2, [teacher Book]. Chicago (Ill.): Creative Publications, 1999.

MLA-Zitierstil (9. Ausg.)

Greenes, Carole E., und Carol R. Findell. Groundworks: Algebraic Thinking, Grade 2, [teacher Book]. Creative Publications, 1999.