APA (7th ed.) Citation

Ellis, T. O., Heafner, J. F., & Sibley, W. L. (1969). The GRAIL language and operations. Rand Corp..

Chicago Style (17th ed.) Citation

Ellis, T. O., J. F. Heafner, and W. L. Sibley. The GRAIL Language and Operations. Santa Monica, Calif.: Rand Corp., 1969.

MLA (9th ed.) Citation

Ellis, T. O., et al. The GRAIL Language and Operations. Rand Corp., 1969.