APA (7th ed.) Citation

Ladner, R. E., Lipton, R. J., & Stockmeyer, L. J. (1984). Alternating pushdown and stack automata. SIAM Journal on Computing, 13, 135. https://doi.org/10.1137/0213010

Chicago Style (17th ed.) Citation

Ladner, Richard E., Richard J. Lipton, and Larry J. Stockmeyer. "Alternating Pushdown and Stack Automata." SIAM Journal on Computing 13 (1984): 135. https://doi.org/10.1137/0213010.

MLA (9th ed.) Citation

Ladner, Richard E., et al. "Alternating Pushdown and Stack Automata." SIAM Journal on Computing, vol. 13, 1984, p. 135, https://doi.org/10.1137/0213010.