The teaching of elementary mathematics /
by the late professor Charles Godfrey ... and A. W. Siddons.
APA Citation
Godfrey, C. (Charles)., Siddons, A. W. (Arthur Warry). (1931). The teaching of elementary mathematics. Cambridge [Eng.]: The University press.
MLA Citation
Godfrey, C. (Charles), 1873-1924, and A. W. (Arthur Warry) Siddons. The Teaching of Elementary Mathematics. Cambridge [Eng.]: The University press, 1931.
Warning: These citations may not always be complete (especially for serials).