Tham khảo Lãi_kép

  1. http://laws.justice.gc.ca/en/showdoc/cs/I-15/bo-ga:s_6//en#anchorbo-ga:s_6 Interest Act (Canada), Department of Justice. The Interest Act specifies that interest is not recoverable unless the mortgage loan contains a statement showing the rate of interest chargeable, "calculated yearly or half-yearly, not in advance." In practice, banks use the half-yearly rate.
  2.  Bài này kết hợp văn bản từ ấn bản hiện nay thuộc phạm vi công cộngChambers, Ephraim biên tập (1728). Cyclopædia, or an Universal Dictionary of Arts and Sciences (ấn bản 1). James & John Knapton, et al.  Đã bỏ qua tham số không rõ |_reuse= (trợ giúp)
  3. Lewin, C G (1970). “An Early Book on Compound Interest - Richard Witt's Arithmeticall Questions”. Journal of the Institute of Actuaries 96 (1): 121–132. 
  4. Lewin, C G (1981). “Compound Interest in the Seventeenth Century”. Journal of the Institute of Actuaries 108 (3): 423–442.