| https://support.google.com/edu/classroom/thread/332855132?hl=en&sjid=3445079853256716466-NC |
| https://support.google.com/edu/classroom/thread/332855574?hl=en&sjid=3445079853256716466-NC |
| https://support.google.com/edu/classroom/thread/332855876?hl=en&sjid=3445079853256716466-NC |
| https://phmsociety.org/phm-forums/topic/how-to-escalate-a-problem-with-expedia-expediaescalate/ |
| https://www.practicalmachinist.com/forum/threads/faq-how-do-i-ask-a-question-at-expedia-step-by-guide.437669/ |