The algae
[by] V. J. Chapman and D. J. Chapman.

APA Citation

Chapman, V. J. (Valentine Jackson)., Chapman, D. J. (1973). The algae. [2d ed.] [London]: Macmillan.

MLA Citation

Chapman, V. J. (Valentine Jackson), 1910-1980, and David J Chapman. The Algae. [2d ed.] [London]: Macmillan, 1973.

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