Gradatim,
an easy Latin translation book for beginners /
by H.R. Heatley ... and H.N. Kingdon ... Rev. for American schools, by W.C. Collar ...

APA Citation

Heatley, H. R. (Henry Richard)., Collar, W. C. (William Coe)., Kingdom, H. Napier. (1890). Gradatim: an easy Latin translation book for beginners. Boston: Ginn and company.

MLA Citation

Heatley, H. R. (Henry Richard), William C. (William Coe) Collar, and Herbert Napier Kingdom. Gradatim: an Easy Latin Translation Book for Beginners. Boston: Ginn and company, 1890.

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