APA (7e ed.) Bronvermelding

RAVEN A D. (1971). PROFIT IMPROVEMETNT BY VALUE ANALYSIS,VALUE ENG.&PUR.PRICE ANALYSIS. CASSELL.

Chicago (17e ed.) Bronvermelding

RAVEN A D. PROFIT IMPROVEMETNT BY VALUE ANALYSIS,VALUE ENG.&PUR.PRICE ANALYSIS. LONDON: CASSELL, 1971.

MLA (9e ed.) Bronvermelding

RAVEN A D. PROFIT IMPROVEMETNT BY VALUE ANALYSIS,VALUE ENG.&PUR.PRICE ANALYSIS. CASSELL, 1971.