Thank you for the suggestion, @neheller . 
Unfortunately, isolated textbooks are not generally considered an appropriate source for citation, for various reasons. MCAT-specific primary sources are generally preferred, if not required (Kaplan, UWorld, etc.).
You might take a look at the submission guidelines here: š AnKing Step Deck Submission Guidelines
That being said, since the card is, itself, discussing hydrogen bonding Iām not certain how necessary it is to specify that there must be hydrogen present. That may be somewhat inferred by the content of the card, as well as the accompanying picture.