* Marshall, Alfred. '' Principles of Economics'' (1898 edition, 820 pages) [http://books.google.com/books?id=u5saAAAAYAAJ&printsec=frontcover&dq=inauthor:alfred+inauthor:marshall&lr=&num=30&as_brr=1&as_pt=ALLTYPES full text online]
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* Marshall, Alfred. '' Principles of Economics'' (1898 edition, 820 pages) [https://books.google.com/books?id=u5saAAAAYAAJ&printsec=frontcover&dq=inauthor:alfred+inauthor:marshall&lr=&num=30&as_brr=1&as_pt=ALLTYPES full text online]
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* Marshall, Alfred. '' The Economics of Industry'' with Mary Paley Marshall (1888) 231 pages [http://books.google.com/books?id=wFc4yr9xfqAC&printsec=frontcover&dq=inauthor:alfred+inauthor:marshall&lr=&num=30&as_brr=1&as_pt=ALLTYPES full text online]
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* Marshall, Alfred. '' The Economics of Industry'' with Mary Paley Marshall (1888) 231 pages [https://books.google.com/books?id=wFc4yr9xfqAC&printsec=frontcover&dq=inauthor:alfred+inauthor:marshall&lr=&num=30&as_brr=1&as_pt=ALLTYPES full text online]