How do you cite (parenthetically) an article that doesn't have a specified author?

The correct word to complete the sentence

Match the types of supporting evidence to the examples. fact anecdote expert opinion emotional appeal sarah's outcome illustrates what can happen when children are left alone too long. arrowright dr. malfoy says physical therapy is for a sprain. arrowright austin has a 21.9-minute average commute time. arrowright we pledge to never stop striving to pluck these vulnerable animals from the jaws of danger. arrowright

Which statement from "letter to his father" is similar to gregor's inability tocommunicate with his father as a bug in the metamorphosis?