Παραπομπή σε μορφή APA (7η εκδ.)

Thelen, E., & Ulrich, B. D. Hidden skills: A dynamic system analysis of treadmill stepping during the first year. [s.n.].

Παραπομπή σε μορφή Chicago (17η εκδ.)

Thelen, Esther, και Beverly D. Ulrich. Hidden Skills: A Dynamic System Analysis of Treadmill Stepping During the First Year. [S.l.]: [s.n.].

Παραπομπή σε μορφή MLA (8th εκδ.)

Thelen, Esther, και Beverly D. Ulrich. Hidden Skills: A Dynamic System Analysis of Treadmill Stepping During the First Year. [s.n.].