The final rank's title in "Ghostbusters: The Video Game" (Realistic Versions) Multiplayer Mode is called "Ghostbuster of the Year".
Peter jokes about the Swimsuit Issue, in reference to Sports Illustrated's annual issue.
Hearse Castle and San Simoleon are a play on Hearst Castle in Sam Simoeon, California.
The main character in "Citizen Kane", Charles Foster Kane, is played by Orson Welles. The actor Maurice LaMarche, who voiced Egon Spengler, is often known for voicing Orson Welles, such as in 1994's "Ed Wood" (Re-dubbing over Vincent D'Onofrio) as well as The Simpsons' "Treehouse of Horror XVII" episode and two episodes of The Critic. LaMarche has also used his Welles voice in other media such as notably, Pinky and the Brain.
Winston's last name is spelled Zeddemore in the original film, instead of the Zeddmore here. This is why Peter tells him the magazine spelled his name wrong.