Aigner, W., & Ramsay, M. R. (1997). Productivity everywhere: Wealth and prosperity for all : the riddles and phenomena of productivity in the amazing world of human activities : a treasure chest of ideas and creative adventure. Advanced Productivity and Quality Centre of Australia (APQCA).
Lua i Stíl Chicago (17ú heag.)Aigner, Walter, agus M. R. Ramsay. Productivity Everywhere: Wealth and Prosperity for All : The Riddles and Phenomena of Productivity in the Amazing World of Human Activities : A Treasure Chest of Ideas and Creative Adventure. Australia: Advanced Productivity and Quality Centre of Australia (APQCA), 1997.
Lua MLA (9ú heag.)Aigner, Walter, agus M. R. Ramsay. Productivity Everywhere: Wealth and Prosperity for All : The Riddles and Phenomena of Productivity in the Amazing World of Human Activities : A Treasure Chest of Ideas and Creative Adventure. Advanced Productivity and Quality Centre of Australia (APQCA), 1997.