Direct Object Pronouns

http://faculty.marianopolis.edu/spanish/spanishiii/span3c7et3t3.html

http://www.verbanet.com.ar/odirecto.html

http://www.123teachme.com/learn_spanish/direct_object_pronouns_placement_1a

http://www.123teachme.com/learn_spanish/direct_object_pronouns_a