Doubt about reference of images Latex

I’m trying to put sequential numbering into two figures. Example: figura 3a , figura 3b . But when I do ref{fig1a} in the text, it shows the later numbering (4b):

documentclass[jou,apacite]{apa6}
usepackage[brazil]{babel} 
usepackage{color}

begin{figure}[h]
  centering
  caption{Calculadora de Adução}
  subfloat[cálculo para mudas]{
    includegraphics[height=4.5cm]{img/adubacao_mudas.png}
    label{fig03a}
  }
  quad %espaco separador
  subfloat[Calculadora de mudas]{
    includegraphics[height=4.5cm]{img/inicial_lateral.png}
    label{fig3b}
  }
label{fig03}
end{figure}

One way to solve this problem semi-definitively is to use the ref and subref :

documentclass[jou,apacite]{apa6}
usepackage[brazil]{babel} 
usepackage{color}
usepackage{subfig}
usepackage[utf8]{inputenc}

begin{document}

begin{figure}[h]
  centering
  caption{Calculadora de Adução}
  subfloat[cálculo para mudas]{
    includegraphics[height=4.5cm]{adubacao_mudas.png}
    label{fig03a}
  }
  quad %espaco separador
  subfloat[Calculadora de mudas]{
    includegraphics[height=4.5cm]{inicial_lateral.png}
    label{fig3b}
  }
label{fig03}
end{figure}

As Subfiguras ref{fig03}subref{fig03a}  e ref{fig03}subref{fig3b} fazem parte da Figura ref{fig03}.

end{document}