An introduction to practical astronomy :
with a collection of astronomical tables /
by Elias Loomis.

APA Citation

Loomis, E. (1891). An introduction to practical astronomy: with a collection of astronomical tables. 7th ed. New York: Harper & Brothers.

MLA Citation

Loomis, Elias, 1811-1889. An Introduction to Practical Astronomy: With a Collection of Astronomical Tables. 7th ed. New York: Harper & Brothers, 1891.

Warning: These citations may not always be complete (especially for serials).