Dyfyniad APA
Johnson, T. E. (1983). Investment principles (2nd ed.). Prentice-Hall.
Dyfyniad Arddull Chicago
Johnson, Timothy E. Investment Principles. 2nd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1983.
Dyfyniad MLA
Johnson, Timothy E. Investment Principles. 2nd ed. Prentice-Hall, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.