JOHN DAINTITH "ISF ." A Dictionary of Computing. . Encyclopedia.com. (December 3, 2024). https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/isf

JOHN DAINTITH "ISF ." A Dictionary of Computing. . Retrieved December 03, 2024 from Encyclopedia.com: https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/isf

FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH "ISF ." The Oxford Dictionary of Abbreviations. . Encyclopedia.com. (December 3, 2024). https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/isf

FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH "ISF ." The Oxford Dictionary of Abbreviations. . Retrieved December 03, 2024 from Encyclopedia.com: https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/isf