Referensi
[volvobuses.com] The three-point seat belt – an innovation that saved over 1 million lives
[cnet.com] 55 years ago today, Volvo received a patent that saved countless lives
[arnoldclark.com] Why Volvo gave away the patent for their most important invention
https://www.arnoldclark.com/blog/advice/who-invented-the-seatbelt
https://www.facebook.com/61557512253819/posts/122173087706250408/?mibextid=rS40aB7S9Ucbxw6v (tautan unggahan akun Dunia Jurnal)
https://ghostarchive.org/archive/stlam (arsip tautan unggahan akun Dunia Jurnal)
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