Harper's weekly.
APA Citation
Hapgood, N., Harvey, G. Brinton McClellan., Bangs, J. Kendrick., Nelson, H. Loomis., Schurz, C., Davis, R. Harding., Foord, J., Schuyler, M., Conant, S. Stillman., Alden, H. Mills., Curtis, G. William., Bonner, J., University of Michigan Humanities Text Initiative., HarpWeek, L. Harper's weekly. [New York: Harper's Magazine Co., etc.].
MLA Citation
HarpWeek, L, et al.. Harper's Weekly. [New York: Harper's Magazine Co., etc.],
Warning: These citations may not always be complete (especially for serials).