Παραπομπή σε μορφή APA (7η εκδ.)

Dillström Norgen, V. (1985). The development of the semiotic function: Studies of children's graphic and verbal representations. Uppsala Universitet ; Distributor, Almqvist & Wiksell International.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Dillström Norgen, Valborg. The Development of the Semiotic Function: Studies of Children's Graphic and Verbal Representations. Uppsala : Stockholm, Sweden: Uppsala Universitet ; Distributor, Almqvist & Wiksell International, 1985.

Παραπομπή σε μορφή MLA (8th εκδ.)

Dillström Norgen, Valborg. The Development of the Semiotic Function: Studies of Children's Graphic and Verbal Representations. Uppsala Universitet ; Distributor, Almqvist & Wiksell International, 1985.