Billingsley, R. S., & Gitman, L. J. J. (2021). Personal Financial Planning (15th.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Billingsley, Randall S., agus Lawrence J. Joehnk Gitman. Personal Financial Planning. 15th. Delhi: Cengage Learning, 2021.
Lua MLA (9ú heag.)Billingsley, Randall S., agus Lawrence J. Joehnk Gitman. Personal Financial Planning. 15th. Cengage Learning, 2021.
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