APA
Tonne Herbert A, Popham Estelle L Freeman M Herbert, . (1949). Methods of teaching business subjects. New York, USA: The Gregg Publishing Company.
Chicago
Tonne Herbert A, Popham Estelle L Freeman M Herbert, . 1949. Methods of teaching business subjects. New York, USA: The Gregg Publishing Company.
Harvard
Tonne Herbert A, Popham Estelle L Freeman M Herbert, . (1949). Methods of teaching business subjects. New York, USA: The Gregg Publishing Company.
MLA
Tonne Herbert A, Popham Estelle L Freeman M Herbert, . Methods of teaching business subjects. New York, USA: The Gregg Publishing Company. 1949.
