Speer Glenn M., Grumet Tobey, Hadad Herbert, Kamisar Stacy, Stiewe David J., & Young, K. R. (1997). The guinness book of world records 1998. Guinness Media.
Chicago Style (17th ed.) ZitazioaSpeer Glenn M., Grumet Tobey, Hadad Herbert, Kamisar Stacy, Stiewe David J., eta Karen Romano Young. The Guinness Book of World Records 1998. Stamford: Guinness Media, 1997.
MLA (9th ed.) ZitazioaSpeer Glenn M., et al. The Guinness Book of World Records 1998. Guinness Media, 1997.
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