APA (7th ed.) Citation

Savitch, W. J. (1977). Recursive turing machines. International journal of computer mathematics, 6(1), 3-31. https://doi.org/10.1080/00207167708803124

Chicago Style (17th ed.) Citation

Savitch, Walter J. "Recursive Turing Machines." International Journal of Computer Mathematics 6, no. 1 (1977): 3-31. https://doi.org/10.1080/00207167708803124.

MLA (9th ed.) Citation

Savitch, Walter J. "Recursive Turing Machines." International Journal of Computer Mathematics, vol. 6, no. 1, 1977, pp. 3-31, https://doi.org/10.1080/00207167708803124.