APA (7th ed.) Citation

Britton, J. P. (2004). An Early Observation Text for Mars: HSM 1899.2.112 (=HSM 1490). Fs Pingree, 33-55.

Chicago Style (17th ed.) Citation

Britton, John P. "An Early Observation Text for Mars: HSM 1899.2.112 (=HSM 1490)." Fs Pingree 2004: 33-55.

MLA (8th ed.) Citation

Britton, John P. "An Early Observation Text for Mars: HSM 1899.2.112 (=HSM 1490)." Fs Pingree, 2004, pp. 33-55.