APA

Gurley W. &. L. E. (. E. U. A., . (1895). A manual of the principal instruments used in american engineering and surveying. Troy, N. published by W. & L. E. Gurley: .

Chicago

Gurley W & L E (Troy E U A.), . 1895. A manual of the principal instruments used in american engineering and surveying. Troy, N. published by W. & L. E. Gurley: .

Harvard

Gurley W. &. L. E. (. E. U. A., . (1895). A manual of the principal instruments used in american engineering and surveying. Troy, N. published by W. & L. E. Gurley: .

MLA

Gurley W & L E (Troy E U A.), . A manual of the principal instruments used in american engineering and surveying. Troy, N. published by W. & L. E. Gurley: . 1895.