How did you think of that? :
An introduction to the scientific method /
[by] David H. Killeffer.

APA Citation

Killeffer, D. H. (David Herbert)., Manufacturing Chemists' Association (U.S.). (19731969). How did you think of that?: An introduction to the scientific method. Washington: American Chemical Society.

MLA Citation

Killeffer, David H. (David Herbert), 1895-, and Manufacturing Chemists' Association (U.S.). How Did You Think of That?: An Introduction to the Scientific Method. Washington: American Chemical Society, 19731969.

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