APA (7th ed.) Citation

Duck, T. A. (1978). A mathematical model of a gymnast on the horizontal bar. [publisher not identified].

Chicago Style (17th ed.) Citation

Duck, Thomas Arthur. A Mathematical Model of a Gymnast on the Horizontal Bar. [Place of publication not identified]: [publisher not identified], 1978.

MLA (9th ed.) Citation

Duck, Thomas Arthur. A Mathematical Model of a Gymnast on the Horizontal Bar. [publisher not identified], 1978.