Gaya APA

Douglass, H, R., W., I, B, R, K, I, B, C, Ã. (NULL). Democratic supervision in secondary schools . Boston:: .

Gaya MLA

Douglass, Harl, R.., W., I., Bent,, Rudyard, K., II., Boardman,, Charles, ì. "Democratic supervision in secondary schools". Boston:: , NULL. Text.