The energy cost of some forms of physical activity of nine-year-old girls ...
APA Citation
Potgieter, M. (1933). The energy cost of some forms of physical activity of nine-year-old girls ... New York city.
MLA Citation
Potgieter, Martha, 1899-. The Energy Cost of Some Forms of Physical Activity of Nine-year-old Girls ... New York city, 1933.
Warning: These citations may not always be complete (especially for serials).