Cita APA (7th ed.)
Popper, K. (1914). Der Stenographie-Unterricht an Pitman's Metropolitan School in London.
Cita Chicago (17th ed.)
Popper, Kamillo. Der Stenographie-Unterricht an Pitman's Metropolitan School in London. Prag, 1914.
Cita MLA (9th ed.)
Popper, Kamillo. Der Stenographie-Unterricht an Pitman's Metropolitan School in London. 1914.
Atenció: Aquestes cites poden no estar 100% correctes.