to clear any confusion...

citation machine is a free web service. there are links provided to purchase materials for APA style formatting, but citation machine is free to use. the link to the APA style format is on the left hand side. there will be a drop down menu and since we are using online journals, that is the link you would want to select. it will format the reference, but will not check for spelling, punctuation, and capitalization mistakes that has been input by the user. it is also not required to register to use the service.