GRAY CLIFFORD F,LARSON ERIK W,DESAI GAUTAM V. (2012). PROJECT MANAGEMENT: THE MANAGERIAL PROCESS (4th.). TATA MCGRAW-HILL EDUCATION PRIVATE LIMITED.

GRAY CLIFFORD F,LARSON ERIK W,DESAI GAUTAM V. PROJECT MANAGEMENT: THE MANAGERIAL PROCESS. 4th. NEW DELHI: TATA MCGRAW-HILL EDUCATION PRIVATE LIMITED, 2012.

GRAY CLIFFORD F,LARSON ERIK W,DESAI GAUTAM V. PROJECT MANAGEMENT: THE MANAGERIAL PROCESS. 4th. TATA MCGRAW-HILL EDUCATION PRIVATE LIMITED, 2012.