https://www.google.com.co/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiA7uH9-5rNAhXLXB4KHUrLCJcQFgglMAE&url=https%3A%2F%2Fes.wikipedia.org%2Fwiki%2FVoleibol&usg=AFQjCNG4mVX3a7KhfdwpTruKr2EXLAsFJg
https://www.google.com.co/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjH_qeF_JrNAhXDXh4KHZjbDyAQFgghMAE&url=https%3A%2F%2Fes.wikibooks.org%2Fwiki%2FVoleibol%2FReglamento&usg=AFQjCNFJIEji9EASkPlUe29QHMtYqS_Huw&bvm=bv.124088155,d.dmo
https://www.google.com.co/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwjH_qeF_JrNAhXDXh4KHZjbDyAQFggyMAM&url=http%3A%2F%2Fwww.uv.es%2Fsefe%2FDocsCompeticions%2FVoleibol%2FReglamento_oficial%2520_voleibol.pdf&usg=AFQjCNFNYnRWyjY6qeQGnyDm8qQbS3p0xw&bvm=bv.124088155,d.dmo
https://www.google.com.co/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiJzoCf_JrNAhXONx4KHYKDDkAQFggaMAA&url=https%3A%2F%2Fes.wikipedia.org%2Fwiki%2FT%25C3%25A9cnica_del_voleibol&usg=AFQjCNEVy7PpQ4PAC3UnugUnmUKpcBBizQ&bvm=bv.124088155,d.dmo
