APA (7e ed.) Bronvermelding
Laubach, F. C. (1960). Thirty years with the silent billion: Adventuring in literacy. Fleming H. Revell Company.
Chicago (17e ed.) Bronvermelding
Laubach, Frank C. Thirty Years with the Silent Billion: Adventuring in Literacy. London: Fleming H. Revell Company, 1960.
MLA (9e ed.) Bronvermelding
Laubach, Frank C. Thirty Years with the Silent Billion: Adventuring in Literacy. Fleming H. Revell Company, 1960.
Let op: Deze citaties zijn niet altijd 100% accuraat.